That's certainly an important advantage, since with the G7 LG moved to the 'secure' unlock system that many OEMs are implementing now. Since @usuario74 mentioned prices in GBP I assume he/she is in the UK, and the G7s that were sold in the EU (model G710EM) can all be unlocked officially (you just need to do some fiddling with filling in the serial numbers on an online form). But beware of people selling imported US models (I saw quite a few offers for these on eBay), since those can't be unlocked through the official method. There is a thread on xda detailing how to get most other models unlocked by cross-flashing to a firmware for Google Fi, but this requires a bit more work.
Oh yes, good point. For those in Europe, bootloader unlock and root is much easier. That was true with V30 as well (and, I assume, all LG models).
I merely meant to point out that there are definite advantages to the V30, both in hardware and (some) in software, and it is a matter of priorities whether one prefers it or the G7.
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